Hydraulically balanced water-stop switch mechanism and shower head having same

Abstract

A hydraulically balanced water-stop switch mechanism includes a water passage pipe, a water passage is formed between an inner pipe and an outer pipe of the water passage pipe. One end of the inner pipe is a closed end, and the other end is movably provided with a water-stop plug. A switch assembly is configured to cause movement of the water-stop plug. A chamber is formed between the water-stop plug and the closed end in the water passage pipe, and the chamber is provided with a ventilation hole. Preferably, the switch assembly includes a push rod, a automatic retractable and locking mechanism as applied in a ballpoint pen, and a elastic reset member for causing the water-stop plug to move toward the water outlet.

What is claimed is,: 
     
         1 . A hydraulically balanced water-stop switch mechanism, comprising a water-stop plug, a water passage pipe and a switch assembly, wherein
 the water passage pipe comprises an inner pipe and an outer pipe, the outer pipe is sleeved outside the inner pipe, and a water passage is formed between the outer pipe and the inner pipe, a first end of the outer pipe serves as a water inlet, a second end of the outer pipe serves as a water outlet; a first end of the inner pipe proximal to the water outlet is an open end, the water-stop plug is arranged inside the inner pipe and the water-stop plug is movable toward the water outlet, the switch assembly is configured to cause movement of the water-stop plug, a second end of the inner pipe proximal to the water inlet is a closed end, and a sealing ring is provided between the water-stop plug and the inner pipe to form a chamber between the water-stop plug and the closed end, and the chamber is provided with a ventilation hole.   
     
     
         2 . The hydraulically balanced water-stop switch mechanism according to  claim 1 , wherein the inner pipe and the outer pipe are integrally formed as a single piece. 
     
     
         3 . The hydraulically balanced water-stop switch mechanism according to  claim 1 , wherein two symmetrical water passages are formed between the inner pipe and the outer pipe at left and right sides. 
     
     
         4 . The hydraulically balanced water-stop switch mechanism according to  claim 1 , wherein the switch assembly comprises a push rod, an automatic retractable and locking mechanism, and an elastic reset member configured to cause the water-stop plug to move toward the water outlet;
 the water-stop plug is provided with a chute with a sloping surface, and the push rod is movable toward the chute to cause the water-stop plug to move in a direction away from the water outlet in the water passage pipe; and   the automatic retractable and locking mechanism is configured to cause movement of the push rod.   
     
     
         5 . The hydraulically balanced water-stop switch mechanism according to  claim 4 , wherein the water passage pipe is provided with a mounting part, the automatic retractable and locking mechanism comprises a switch cap, an outer shell, a pressing rod, a locking member, and a second compression spring, the pressing rod, the locking member, and the second compression spring are arranged in sequence inside the outer shell;
 a first end of the outer shell is connected to the mounting part, the push rod is connected to the locking member, the switch cap is installed on a second end of the outer shell, and the switch cap is connected with the pressing rod.   
     
     
         6 . The hydraulically balanced water-stop switch mechanism according to  claim 5 , wherein the outer shell comprises a guiding cylinder and a cover plate, the cover plate is engaged with the guiding cylinder, and the guiding cylinder is engaged with the mounting part. 
     
     
         7 . A shower head having a water-stop switch mechanism, comprising a shower head main body, wherein the shower head main body is provided with a handle;
 the water-stop switch mechanism comprises a water-stop plug, a water passage pipe and a switch assembly, wherein   the water passage pipe comprises an inner pipe and an outer pipe, the outer pipe is sleeved outside the inner pipe, and a water passage is formed between the outer pipe and the inner pipe, a first end of the outer pipe serves as a water inlet, a second end of the outer pipe serves as a water outlet; a first end of the inner pipe proximal to the water outlet is an open end, the water-stop plug is arranged inside the inner pipe and the water-stop plug is movable toward the water outlet, the switch assembly is configured to cause movement of the water-stop plug, a second end of the inner pipe proximal to the water inlet is a closed end, and a sealing ring is provided between the water-stop plug and the inner pipe to form a chamber between the water-stop plug and the closed end, and the chamber is provided with a ventilation hole; and   the water-stop switch mechanism is arranged inside the handle.   
     
     
         8 . The shower head having a water-stop switch mechanism according to  claim 7 , wherein the shower head further comprises a connection pipe, the connection pipe is assembled inside the handle, a first end of the connection pipe communicates with the water inlet of the water passage pipe, and a second end of the connection pipe extends to the outside of the handle and is provided with a connection part.